Method for closing a contactor, and contactor having temperature compensation
A technology of contacts and closed positions, applied in relays, semiconductor devices, electromagnets with armatures, etc., can solve problems such as high computing efficiency
Pending Publication Date: 2022-01-07
SCHALTBAU GMBH
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Problems solved by technology
However, this approach requires relatively large computational efficiency and therefore presupposes the use of expensive microprocessors
Method used
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Embodiment Construction
[0045] figure 1 A schematic diagram of a contactor 1 according to the invention is shown according to an exemplary embodiment of the invention. The contactor 1 has a housing 10 , shown only in fragments, and a contact point with a double breaking point. The contact part consists of two fixed contacts 5 and a movable contact bridge 6 . The contact bridge 6 is mounted via a contact pressure spring 7 on a contact carrier 9 which is connected via an insulating rod 4 to the movable armature 3 of the electromagnetic drive of the contactor 1 . The armature 3 and the yoke 8 of the electromagnetic drive are at least partially surrounded by the coil 2 of the electromagnetic drive. When the coil 2 is energized by applying a sufficient voltage, the armature 3 is attracted against the force of the return spring 13 acting between the yoke 8 and the armature 3 , so that the contacts are closed.
[0046] figure 2 show figure 1 The circuit diagram of the contactor according to the presen...
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The present invention relates to a method for closing the contacts of an electrical switching device during a switch-on process, the electrical switching device having an electromechanical drive with a coil and with an armature, which can be moved between an open position and a closed position, and the coil being energized in order to close the contacts of the electrical switching device. According to the invention, first a constant first voltage is applied to the coil during a first time period and a measurement value is determined. Either the first time period is fixed, and the measurement value is a current value determined at the end of the first time period by measuring the current flowing in the coil, the first time period and the first voltage being selected in such a way that the armature is not set into motion during the first time period, or the first voltage is applied to the coil until a certain current value of the current flowing in the coil is reached, the first time period being the time period until said certain current value is reached, the first time period being the measurement value, and the first voltage being selected in such a way that the armature is not set into motion during the first time period. A suitable second voltage is defined in accordance with the measurement value, the second voltage being greater than the first voltage and being applied to the coil during a second time period in order to move the armature from the open position into the closed position.
Description
technical field [0001] The invention relates to a method for closing contacts of an electrical switching device during a switching-on process according to the preamble of independent claim 1 . In this case, the electrical switching device has an electromechanical drive with a coil and an armature movable between an open position and a closed position, the coil being energized for closing the contacts of the electrical switching device. In this case, the armature of the electromechanical drive is connected to the movable contact piece of the electrical switching device. The invention also relates to an electrical switching device according to the preamble of independent claim 10 . Background technique [0002] Electrical switching devices, in particular high-power contactors, are sometimes subject to high temperature fluctuations in many areas of application. This applies, for example, to high-power contactors used in rail vehicles, motor vehicles or outdoor installations. ...
Claims
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Patent Timeline
Login to View More IPC IPC(8): H01H47/32H01F7/18H03K17/64
CPCH01H47/325H01F7/1844H01F2007/1855H01H47/26H01H2047/025H01H47/02
Inventor P·利希特
Owner SCHALTBAU GMBH